NEW ThreadNanny CZECH Quality 10gross (1440pcs) HotFix Rhinestones Crystals - 4mm/16ss, BLACK DIAMOND Color 10 Gross (1440 Stones Total) Size 16ss (4mm) Extra Sparkle Black Diamond Color Czech Quality Precision cut multi-faceted - flatback HOTFIX Glue on bottom makes them easier to attached 4mm Size (16ss). Other sizes available too, please check our other Amazon Listings.